Apparatus for shaping sheet metal



June 30, 193 1.

O. J. GROEHN ET AL APPARATUS FOR SHAPING SHEET METAL 28 1927 5Sheets-Sheet l R E &

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@aQMQrkmApL fifzorneys Original Filed Dec.

June 30, 1931. o. J. GROEHN ET AL 1,812,045

. APPARATUS FOR SHAPING SHEET METAL Original Filed Dec. '28, 1921 sSheets-Sheet 2 Ingenfars: yW QMQ QQJL v I ti'orn eys.

June 30, 1931.

o. J. GRQEHN ET AL I APPARATUS FOR SHAPING SHEET METAL OriginalFiledDec. 28, 1927 3 Sheets-Sheet 3 By W. M

Patented June 1 Qm; a j GROEHN. I Erbiu RK A L R j ME, orrenossEOriginal application filed. D

. romzrn. nozrream assreirons: TO -HUDSON MICHIGAN; A CQBZPORATIQNOE'MIcH A J lirrni a'rusron SHAPING SHEET METALDivided.andithislapplication filled February 8,1i1929. :QS eria1 Ne. assst. I Y

7 This i invention frelawqto apparatus br shaping sheet metal; and;more"- particularly to apparatus for oflsettingaiflange previouslyformed by bendinga body-ofsheet' metal.

. 1, This application is a division of our pending applicationxserialNo. 243,030, filed. -December 28, 1927-,Pa'tent No." 1,708,615,

. dated April 9,1929, which discloses a method of shaping sheet metal toproducea quarter window finish molding for an automobile body. g I

It is the object'of the present invention to provide an apparatus whichis particularly suitable for use in offsetting a flange in the: practiceof the method described in our;

above mentioned co -pending application."

p The invention will be more clearly under I stood from thefollowing'description' in conjunction with the accompanying drawings;

in which, r

Fig. 1 isa plan view of the lower half of an apparatus embodying theinvention Fig. 2 is a side elevational view ofthe Figs. 3 and 4 aresectional views taken "upon line 3.3 of Fig. 11, showing the relation ofthe parts at the beginning and completion ofoperation respectively; 7

Figs. 5 and 6 are sectional views taken upon-line 55 of Fig. 1; and

Fig. 7 is a plan view of the blank as shaped 7 V p l.ingthroughopenings29provided-with shoul- .Clers 30 to engagethe'head'ofthe' bolt an'd f aserveiasastop therefor. "fThemandrel n'orInally-..i she1din" extended position bysprings 31.-withinre cesses 32andextendingto en with the apparatus. Before explaining in detail thepresent invention, it 'is'to be understood thatthe invention is notlimited in its" application to carried out in various ways. Also itistobe understood that the phraseology or terminology employed herein'isfor the purpose of description and not of limitation, and itis notintended to limit theinvention beyond the terms of the several claimshereto apart and the requirements thereof,

' ended as considered inf-view of the prior V. V r v .7 p v 1ablemannen; as by screws 37... A wearing block 40 I is secured, 1 asscrewsal, to the V outer; lowier.,edgezofeachdie andxeach 1s Theapparatus ofthe invention is .a-dapt ed particularly for 'shaping asheetmetal blank previously formedzi vs r ith*flange's 7a accompanyingdrawings which comprises a base-10ihaving spaeedipro-jections'1-1'extende V e 55, b'er 12'is positionedfbetweenfitheprojections J ingupwardly. therefronn A suitable meni 11 and securedupon the top surface. of the baseiin any suitable manner, asby-screwsi'li,

and serves tollsupp ort 'the body of the blank.

A plate 15 is 'providedwithran opening'16 :MOTOB can oomranr, orDETROIT,

Oember 28Q1927i5ria1 243,0340; was is. 1,708,615, dated was, 1929. i

andfZb. One embodiment oi the invention isj illustrated by the apparatusshown in-the to provide. clearance forithe member '12 and is; r'n'ovablysecured to. the base: "by, bolts 17 15, and passing through openings 1'8in the the ram directly above the member 12 to re:

.ceivefor movement therein a;;mandrel 27. The 'mandre'l 27- is heldupontheram 22b i having threaded engagement with the plate '7 basem.Theopenings 18"are pro'vided withshoulders 19 adapted; toengagetlie-rheadof I 'lthe bolts andserve as a stop'therefor. The I plate 15normally is held in an;eXtended ;.po-

" sition' byjsprin gsi20 supported in-recesses' 21 win-the: baseand'engaging thelower surface" Z0 bolts -28 threaded to the mandrel' andpass- 3 gage the topsurface'of thema'nd'rel. "Bearing blocks 33 aresecured to the lower sur-.

faceof-the mm upon opposite'sides of the Q90 7 f mandrel 27 in any'suitablemanneflas by t 7 screws '34.

Dies- 35 are wearinglblooks 36 secured therto in anysuit a ap d for egagement w th {@g Wea n block or cam 42 upon the inner surface of one ofthe projections 11.

Suitable means are provided for holding the dies away from the mandrel27 and member 12. For this purpose brackets are secured to the plate 15in any suitable manner, as by screws 16, and are provided near theirupper free ends with openings 17 to permit the free passage of bolts 18secured at one end to the dies 35. A spring 19 surrounds each bolt- 48and extends between the brackets 45 and washers 50 positioned and heldnear the free ends of the bolts by nuts 51.

In performing this operation the blank is placed in the apparatus withthe body of the blank resting upon the support 12 and with the flanges7a and 7?) extending upwardly. The ram 22 is then lowered to bring themandrel 27 between the flanges and into engagement with the body of theblank to hold the same against the member 12. Upon further downwardmovement of the ram 22, the bearing plates 33 eilga-ge the top surfaceof the dies 35 to move the same downwardly together with the plate 15.In the course of the downward movement of the dies, the blocks 40 arebrought into engagement with the cams 12 whereby the dies are movedinwardly in a direction perpendicular to the direction in which they aremoved solely by the ram, thereby imparting a resultant movement to thedies inclined to the member 12 and mandrel 27 to cause the blocks 36 toengage the flanges to fold them along the lines of previous bend. Inthis manner the portions and 7 (Z of flanges 7 b and 70; respectivelyare brought against the mandrel 27 and the portions 7 e and 7 f of theflanges 7 Z) and 7 a respectively against the body of the blank upon themember 12.

When the blank has been shaped in this manner, the ram 22 is raised toremove the mandrel 27 from the blank and the plates 38 from the dies 35.At the same time the springs 20 raise the plate 15 together with thedies 35, and the springs 49 act upon the dies to move them outwardlyalong the cams 42. During this operation each flange on one side of thebody 7 of the blank is ofllset while only the central flange upon theother side of the body is offset.

We claim:

1. In an apparatus for shaping sheet metal previously bent with aflange, the combination of a member for supporting the body of said bentmetal, a mandrel movable towards said member against the body of themetal, a die movable in a path inclined to said member, means formovably supporting said die, and means for urging said diesimultaneously in perpendicular directions thereby imparting a.resultant movement thereto in a direction inclined to said member tomove said flange against said mandrel and the body of the metal on saidmember.

2. In an apparatus for shaping sheet metal previously bent with aflange, the combination of a member for supporting the body of said bentmetal, a mandrel movable towards said member against the body of themetal, a support yieldingly mounted near said member, a die movable withand relative to said support, means for moving said die and support, andmeans for moving said die relative to said support.

In an apparatus for shaping sheet metal previously bent with a flange,the combination of a member for supporting the body of the metal, a rammovable towards and from said member, a mandrel yieldingly mounted onsaid ram and adapted to engage the body of said metal, a supportyieldingly mounted near said member, a. die movable with and relative tosaid support, means for moving said die and support, and means formoving said die relative to said support.

In testimony whereof we affix our signatures.

OTTO J. GROEHN. LAWRENCE S. LAMB.

